CN110276227B - Display screen - Google Patents
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- CN110276227B CN110276227B CN201810207068.5A CN201810207068A CN110276227B CN 110276227 B CN110276227 B CN 110276227B CN 201810207068 A CN201810207068 A CN 201810207068A CN 110276227 B CN110276227 B CN 110276227B
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- light
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- light transmission
- display screen
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- 230000005540 biological transmission Effects 0.000 claims abstract description 43
- 238000003384 imaging method Methods 0.000 claims description 37
- 238000009792 diffusion process Methods 0.000 claims description 18
- 230000001502 supplementing effect Effects 0.000 claims description 4
- 238000005516 engineering process Methods 0.000 description 8
- 239000004973 liquid crystal related substance Substances 0.000 description 5
- 230000003287 optical effect Effects 0.000 description 4
- 239000012780 transparent material Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
- G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
- G06V40/12—Fingerprints or palmprints
- G06V40/13—Sensors therefor
- G06V40/1318—Sensors therefor using electro-optical elements or layers, e.g. electroluminescent sensing
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
- G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
- G06V40/12—Fingerprints or palmprints
- G06V40/13—Sensors therefor
- G06V40/1324—Sensors therefor by using geometrical optics, e.g. using prisms
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Human Computer Interaction (AREA)
- General Physics & Mathematics (AREA)
- Multimedia (AREA)
- Theoretical Computer Science (AREA)
- Optics & Photonics (AREA)
- Image Input (AREA)
Abstract
The embodiment of the invention discloses a display screen, which comprises a prism sheet, a light guide plate and a reflecting plate, wherein a light transmission part is arranged in the prism sheet, a first light transmission hole corresponding to the light transmission part is arranged in the reflecting plate, and light rays sequentially pass through the light transmission part, the light guide plate and the first light transmission hole. In the embodiment of the invention, the light for collecting the fingerprint image can sequentially pass through the light transmission part in the prism sheet, the light guide plate and the light transmission hole in the reflecting plate and be emitted to the photosensitive device in the collector, so that the fingerprint collection under the screen of the display screen is smoothly completed.
Description
Technical Field
The embodiment of the invention relates to the technical field of under-screen fingerprint identification, in particular to a display screen.
Background
The under-screen fingerprint identification technology is a fingerprint identification technology for acquiring fingerprints at the other side of a display screen through a collector arranged at one side of the display screen so as to finish fingerprint identification. In practical application of the under-screen fingerprint identification technology, when a finger touches the display screen, a collector at the other side of the display screen can collect fingerprints, and then fingerprint identification is completed through a processor connected with the collector.
Typical display screens include Liquid crystal display (Liquid CRYSTAL DISPLAY, LCD) and Organic Light-Emitting Diode (OLED) screens. The technology for realizing the fingerprint identification under the screen by adopting the OLED screen is simpler than that of the technology for realizing the fingerprint identification under the screen by adopting the LCD screen. Therefore, OLED screens are commonly used as display screens for off-screen fingerprint recognition technology. Because the LCD screen has the advantages of wide application, the electronic device using the LCD screen also has the functional requirement of fingerprint identification under the screen, but the technology of fingerprint identification under the screen is difficult to realize by using the LCD screen.
The reason why it is difficult to implement the off-screen fingerprint recognition technology using the LCD screen is as follows. As shown in fig. 1, the LCD screen at least includes a protection panel 1 and a backlight module (the structure of the protection panel between the backlight modules is not shown in fig. 1). The backlight module comprises a light source 2, a reflecting plate 5, a light guide plate 4 and two layers of prism sheets 3. The light source 2 is located at one side of the light guide plate 4, and light emitted from the light source 2 can be propagated from one side to the other side of the light guide plate 4 by total reflection, thereby lighting the entire screen. The two-layered prism sheet 3 serves to converge light rays diverged from respective angles emitted from the light guide plate 4 to an angle perpendicular to the screen, thereby enhancing brightness of the screen. Because the prism sheet 3 can collect the light rays emitted from the light guide plate 4, when the LCD screen is used for collecting the fingerprint image on one side of the protection panel 1, the light rays transmitted from the protection panel 1 need to be transmitted through the backlight module to the collector, the light rays can become divergent after passing through the prism sheet 3, and the collector cannot collect the clear fingerprint image; in addition, the reflecting plate 5 in the backlight module can reflect most of the light back to the light guide plate 4, and only a very small amount of light can pass through the reflecting plate 5 to reach the collector, so that the collector is difficult to collect fingerprint images; it is difficult to implement an off-screen fingerprint recognition technique using an LCD screen.
Disclosure of Invention
The embodiment of the invention provides a display screen, which can realize fingerprint identification under the screen.
The display screen provided by the embodiment of the invention comprises a prism sheet, a light guide plate and a reflecting plate, wherein a light transmission part is arranged in the prism sheet, a first light transmission hole corresponding to the light transmission part is arranged in the reflecting plate, and light rays sequentially pass through the light transmission part, the light guide plate and the first light transmission hole.
Further, the light-transmitting part is at least one of a light-transmitting part in the form of a small hole, a light-transmitting part with two planes, a light-transmitting part with one plane and the other curved surface, and a light-transmitting part with two curved surfaces.
Further, the prism sheet is provided with a plurality of light-transmitting parts, and the light-transmitting parts are arranged in an array or staggered manner.
Further, a diffuse reflection layer is further arranged between the light guide plate and the reflecting plate, diffusion points are paved on one side of the diffuse reflection layer, a first light transmission hole in the reflecting plate and a diffusion point gap on the diffuse reflection layer are oppositely arranged, and light sequentially passes through the light transmission part, the light guide plate, the diffusion point gap on the diffuse reflection layer and the first light transmission hole.
Further, the diffuse reflection layer is provided with a second light transmission hole corresponding to the first light transmission hole, and light rays sequentially pass through the light transmission part, the light guide plate, the second light transmission hole and the first light transmission hole.
Further, the display screen also comprises a collector, the collector comprises a mask, one side of the mask is connected with a reflecting plate, an imaging hole communicated with the first light transmission hole is formed in the mask, a cavity communicated with the imaging hole is formed in the other side of the mask, a photosensitive device is arranged at the bottom of the cavity, and light rays pass through the light transmission part, the first light transmission hole and the imaging hole and irradiate to the photosensitive device in the cavity.
Further, a lens for converging light rays emitted to the photosensitive device is arranged at the imaging hole.
Further, the collector comprises a plurality of through holes which are parallel to each other, a photosensitive device is arranged at the bottom of each through hole, each first light-transmitting hole is communicated with at least one through hole, the diameter of each through hole is 0.5-50 microns, and the size of a collecting area corresponding to each through hole is the same as the size of a collected image.
Further, a light supplementing light source is arranged on one side, connected with the reflecting plate, of the collector.
The embodiment of the invention also provides electronic equipment, which comprises the display screen.
In the embodiment of the invention, the light for collecting the fingerprint image can sequentially pass through the light transmission part in the prism sheet, the light guide plate and the light transmission hole in the reflecting plate and be emitted to the photosensitive device in the collector, so that the fingerprint collection under the screen of the display screen is smoothly completed.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, and it will be obvious to those skilled in the art that other drawings can be obtained from these drawings without inventive effort.
FIG. 1 is a schematic diagram of a display screen of the prior art;
FIG. 2 is a cross-sectional view of a display screen according to an embodiment of the present invention;
FIG. 3 is a cross-sectional view of another display screen provided by an embodiment of the present invention;
FIG. 4 is a cross-sectional view of yet another display screen provided in an embodiment of the present invention;
FIG. 5 is a top view of a prism sheet according to an embodiment of the present invention;
FIG. 6 is a cross-sectional view of yet another display screen provided in an embodiment of the present invention;
FIG. 7 is a cross-sectional view of yet another display screen provided in an embodiment of the present invention;
FIG. 8 is a cross-sectional view of yet another display screen provided in an embodiment of the present invention;
Fig. 9 is a top view of another prism sheet according to an embodiment of the present invention;
FIG. 10 is a cross-sectional view of yet another display screen provided in an embodiment of the present invention;
fig. 11 is a cross-sectional view of still another display screen according to an embodiment of the present invention.
Wherein, 1, protect the faceplate; 2. a light source; 3. a prism sheet; 31. a light transmitting portion; 4. a light guide plate; 5. a reflection plate; 51. a first light hole; 6. a collector; 61. a mask; 62. an imaging aperture; 63. a cavity; 64. a photosensitive device; 65. a through hole; 66. a through hole wall; 67. a light supplementing light source; 7. a diffuse reflection layer; 71. diffusion points; 8. a diffusion layer; 81. a third light hole; 9. a lens; 10. a transparent medium.
Detailed Description
In order that the above-recited objects, features and advantages of the present invention will become more readily apparent, a more particular description of the invention will be rendered by reference to the appended drawings and appended detailed description.
Referring to fig. 2, a cross-sectional view of a display screen is provided in an embodiment of the present invention, where a backlight module in the display screen includes a prism sheet 3, a light guide plate 4, and a reflective plate 5, where a light transmitting portion 31 is disposed in the prism sheet 3, and a first light transmitting hole 51 corresponding to the light transmitting portion 31 is disposed in the reflective plate 5, and light sequentially passes through the light transmitting portion 31, the light guide plate 4, and the first light transmitting hole 51. A collector 6 for collecting fingerprint images is also arranged under the display screen. The light passing through the first light-transmitting holes 51 can be directed to the collector 6, thereby realizing collection of the light. The display screen of the embodiment of the invention can be an LCD screen or other display screens.
In order to prevent light for capturing a fingerprint image from becoming divergent light after passing through the prism sheet 3, thereby breaking the optical path imaging, a light transmitting portion 31 may be provided on the prism sheet 3. The light-transmitting portion 31 may be a hollow aperture, and after passing through the aperture, the light does not become divergent, i.e., the imaging of the light path is not destroyed. The transparent portion 31 may be a transparent portion formed of a transparent material, and both surfaces of the transparent portion 31 may be planar, one surface may be planar, the other surface may be curved, or both surfaces may be curved, so that the light path imaging may not be destroyed after passing through the transparent portion 31. When any one surface of the light transmitting portion 31 is a curved surface, a lens structure capable of converging light, such as a convex lens, can be formed, and normal imaging of the optical path can be ensured. Therefore, the light-transmitting portion 31 in the prism sheet 3 may include at least one of a light-transmitting portion 31 in the form of a small hole, a light-transmitting portion 31 having both surfaces as a plane, a light-transmitting portion 31 having one surface as a plane and the other surface as a curved surface, and a light-transmitting portion 31 having both surfaces as curved surfaces. The two surfaces of the light-transmitting portion 31 are located on the two surfaces of the prism sheet 3, respectively. The two surfaces of the light-transmitting portion 31 are disposed opposite to each other, and the areas of the two surfaces may be the same or different.
In the embodiment of the present invention, the first light holes 51 in the reflecting plate 5 may be hollow holes, or may be light holes formed of transparent materials, or any other light holes that do not destroy the optical path imaging. The two surfaces of the first light holes 51 may be planar or curved, and the shape of the two surfaces of the first light holes 51 is not specifically limited in the embodiment of the present invention. The light emitted from the light transmitting portion 31 can be transmitted out of the reflecting plate 5 through the first light transmitting hole 51, thereby avoiding the reflecting plate 5 from reflecting the light back to the light guide plate 4, and ensuring normal imaging of the light path.
The display screen may include one or two layers of prism sheets 3, and the prism sheet 3 may have a structure in which one side is a plane and the other side is covered with a prism structure. In a specific application, the number and structure of the prism sheets 3 may be set accordingly as needed, so the embodiment of the present invention does not specifically limit the number and structure of the prism sheets 3. When the display screen includes two-layer prism sheet 3, all set up printing opacity part 31 on every layer prism sheet 3 to printing opacity part 31 on the two-layer prism sheet 3 corresponds each other, so that light can pass through printing opacity part 31, light guide plate 4 and first light trap 51 on the two-layer prism sheet 3 in proper order, realizes fingerprint image's collection.
As shown in fig. 3, a diffuse reflection layer 7 may be further disposed between the light guide plate 4 and the reflection plate 5, a diffusion point 71 is disposed on one side of the diffuse reflection layer 7, a first light hole 51 in the reflection plate 5 is disposed opposite to a gap between the diffusion points 71 on the diffuse reflection layer 7, and light sequentially passes through the light transmission portion 31, the light guide plate 4, the gap between the diffusion points on the diffuse reflection layer 7, and the first light hole 51, and is directed to the collector 6. The first light transmitting holes 51 are disposed opposite to the diffusion point gaps on the diffuse reflection layer 7, and the diffusion points 71 can be prevented from damaging the optical path imaging. In a specific implementation, a second light hole corresponding to the first light hole 51 may be disposed at an arbitrary position of the diffuse reflection layer 7, and light may sequentially pass through the light transmitting portion 31, the light guide plate 4, the second light hole and the first light hole 51, and be directed to the collector 6. The second light hole can be a hollow small hole, a light hole formed by transparent materials, and any other light hole which can not damage the light path imaging. The two surfaces of the second light hole may be plane or curved, and the shape of the two surfaces of the second light hole is not specifically limited in the embodiment of the present invention. It should be noted that, the display screen provided in the embodiment of the present invention may or may not include a diffuse reflection layer. In addition, by providing diffusion points on the surface of the light guide plate 4 on the side close to the reflecting plate 5, the function of the diffuse reflection layer can be also realized. Such a design may be understood as providing a portion of the light guide plate 4 as a diffuse reflection layer.
As shown in fig. 4, the prism sheet 3 and the light guide plate 4 may further include a diffusion layer 8, and a third light hole 81 corresponding to the light transmitting portion 31 is disposed on the diffusion layer 8, and light may sequentially pass through the light transmitting portion 31, the third light hole 81, the light guide plate 4, and the first light hole 51, and be directed to the collector 6. The second light hole can be a hollow small hole, a light hole formed by transparent materials, and any other light hole which can not damage the light path imaging. The two surfaces of the second light hole may be plane or curved, and the shape of the two surfaces of the second light hole is not specifically limited in the embodiment of the present invention. It should be noted that, the display screen provided in the embodiment of the present invention may or may not include a diffusion layer.
As shown in fig. 5, a plurality of light-transmitting portions 31 may be disposed on the prism sheet 3, the light-transmitting portions 31 may be arranged in an array, and the light-transmitting portions 31 may be arranged in a staggered manner (not shown). Each light-transmitting portion 31 corresponds to a different area of the fingerprint acquisition area, and the areas corresponding to any two adjacent light-transmitting portions 31 overlap each other. The number and arrangement of the light transmitting portions 31 are not particularly limited in the embodiment of the present invention. In a specific implementation, the first light holes 51 on the reflective plate 5 may correspond to the light transmitting portions 31 one by one, so when the light transmitting portions 31 are arranged in an array or in a staggered arrangement, the first light holes 51 may be arranged in an array or in a staggered arrangement, respectively. When the diffuse reflection layer 7 and the diffusion layer 8 are disposed in the display screen and the light transmitting portions 31 are arranged in an array or in a staggered arrangement, the second light transmitting holes and the third light transmitting holes 81 may be arranged in an array or in a staggered arrangement, respectively.
The embodiment of the invention provides three fingerprint image acquisition modes, which correspond to the acquisition units 6 with the following structures respectively.
Embodiment one:
The collector 6 can collect fingerprint images by means of aperture imaging. As shown in fig. 2, the collector 6 includes a mask 61, one side of the mask 61 is connected to the reflecting plate 5, an imaging hole 62 communicating with the first light transmitting hole 51 is provided in the mask 61, a cavity 63 communicating with the imaging hole 62 is provided at the other side of the mask 61, a photosensitive device 64 is provided at the bottom of the cavity 63, light can be emitted to the photosensitive device 64 in the cavity 63 through the light transmitting portion 31, the first light transmitting hole 51 and the imaging hole 62, and the photosensitive device 64 can be a photoelectric conversion sensor. The first light transmitting holes 51 and the imaging holes 62 may be in one-to-one correspondence.
The aperture of the first light hole 51 is not smaller than the aperture of the imaging hole 62. Because of process limitation, generally, the aperture of the imaging hole 62 on the collector 6 is easier to control than the aperture of the first light transmitting hole 51 on the reflecting plate 5, so that the aperture of the imaging hole 62 needs to be ensured to be in accordance with a preset size, and the aperture of the first light transmitting hole 51 is only required to be ensured to be larger than the aperture of the imaging hole 62, without specifically limiting the aperture of the first light transmitting hole 51, and the implementation is easier. It should be noted that, in the embodiment of the present invention, the size of the aperture of the first light hole 51 may be specifically defined, for example, the size of the aperture of the imaging hole 62 is equal to the size of the aperture.
Embodiment two:
The collector 6 may collect the fingerprint image by means of lens imaging. As shown in fig. 6, a lens 9 for converging light toward the photosensitive device 64 may be provided at the imaging aperture 62 on the basis of a structure similar to the collector 6 shown in fig. 2. The lens 9 may be disposed on either side of the mask 61, and the lens 9 may be a convex lens 9 or other type of lens 9. As shown in fig. 5, the lenses 9 at the respective imaging holes 62 may be independently provided, and the imaging holes 62 are in one-to-one correspondence with the lenses 9. Alternatively, as shown in fig. 7, a transparent medium 10 may be provided between the reflection plate 5 and the mask plate 61, lenses 9 corresponding to the respective imaging holes 62 are provided on the transparent medium 10, and the imaging holes 62 are in one-to-one correspondence with the lenses 9. The imaging hole 62 in the first embodiment may be different in size from the imaging hole 62 in the second embodiment, and the cavity 63 in the first embodiment may be different in depth from the cavity 63 in the second embodiment.
Embodiment III:
The collector 6 may collect fingerprint images through dense through holes. As shown in fig. 8, the collector 6 includes a plurality of through holes 65 parallel to each other, a photosensitive device 64 is disposed at the bottom of each through hole 65, each first light-transmitting hole 51 is communicated with at least one through hole 65, the diameter of each through hole 65 is 0.5 micrometers-50 micrometers, and the size of the collection area corresponding to each through hole 65 is the same as the size of the collected image. In order to make the size of the collection area corresponding to each through hole 65 the same as the size of the collected image, the diameter of the through hole 65 and the length of the through hole 65 may be set to appropriate values so that the through holes 65 receive parallel light rays or nearly parallel light rays. Since the through holes 65 are densely arranged, and each through hole 65 can collect images of different areas, fingerprint images with continuous lines can be obtained by stitching the images collected by each through hole 65.
In a specific implementation, the length of each via 65 may be more than 5 times the diameter of the via 65, with a hole center-to-center spacing between adjacent vias 65 of less than or equal to 50.8 microns. And the included angle of the axis of the through hole 65 and the horizontal plane of the collector 6 may be 30 ° or more and 90 ° or less. In the present embodiment, the light-transmitting portions 31 and the first light-transmitting holes 51 may be in one-to-one correspondence with the through holes 65, respectively, or the light-transmitting portions 31 and the first light-transmitting holes 51 may not be in one-to-one correspondence with the through holes 65. When the light-transmitting portions 31 and the first light-transmitting holes 51 do not correspond to the through holes 65 one by one, as shown in fig. 9, one light-transmitting portion 31 may be disposed on the prism sheet 3, and one first light-transmitting hole 51 corresponding to the light-transmitting portion 31 may be disposed in the reflecting plate 5, where the first light-transmitting holes 51 correspond to all the through holes 65, that is, each through hole 65 receives light emitted from the same first light-transmitting hole 51.
In the first and second embodiments, the side of the mask 61 connected to the reflective plate 5 may be a smooth plane, so that when light rays emitted from the light source into the light guide plate 4 are transmitted, the light rays are reflected back into the light guide plate 4 to a greater extent when the light rays are emitted to the mask 61 through the first light transmitting holes 51, thereby reducing light loss caused by the first light transmitting holes 51. For similar reasons, in the third embodiment, the upper surface of the through-hole wall 66 between the respective through-holes 65 may also be a smooth surface.
To compensate for the light loss due to the provision of the first light transmission holes 51 in the reflective plate 5, a light supplementing light source 67 may be further provided on the collector 6 at the side connected to the reflective plate 5. The reflecting plate 5 is provided with a light compensating hole corresponding to the light compensating light source 67, so that at least part of the light compensating light source 67 is injected into the light guide plate 4 through the light compensating hole. As shown in fig. 10 and 11, the light-compensating hole may be the first light-transmitting hole 51, that is, the light-compensating light source 67 may be disposed on the collector 6 at a position opposite to the first light-transmitting hole 51. When the light-compensating light source 67 is located at a position on the collector 6 opposite to the first light-transmitting hole 51, the light emitted by the light-compensating light source 67 is directed toward the light-guiding plate 4. In the first and second embodiments, the light-compensating light source 67 may be provided on the mask 61. The number and positions of the light-compensating light sources 67 are not particularly limited in the embodiment of the present invention.
Two layers of polaroids are further arranged between the prism sheet 3 and the protection panel 1, a liquid crystal layer is arranged between the two layers of polaroids, and light can rotate after passing through the liquid crystal layer, so that the brightness of the display screen can be adjusted by combining the two layers of polaroids. When the display screen is used for collecting fingerprint images, the light can pass through the polaroid to a greater extent after rotating through controlling the external electric field of the liquid crystal layer, so that the normal imaging of the light path is ensured.
The embodiment of the invention also provides electronic equipment, which comprises the display screen. The electronic device may be any device that uses a display screen as a display screen, such as a mobile phone, a television, a computer, a notebook, and a tablet computer.
In the embodiment of the invention, the light for collecting the fingerprint image can sequentially pass through the light transmission part in the prism sheet, the light guide plate and the light transmission hole in the reflecting plate and be emitted to the photosensitive device in the collector, so that the fingerprint collection under the screen of the display screen is smoothly completed.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (7)
1. The display screen comprises a prism sheet, a light guide plate and a reflecting plate, and is characterized in that a light transmission part is arranged in the prism sheet, a first light transmission hole corresponding to the light transmission part is arranged in the reflecting plate, and light rays sequentially pass through the light transmission part, the light guide plate and the first light transmission hole;
The light-transmitting part is at least one of a small-hole light-transmitting part, a light-transmitting part with two planes, a light-transmitting part with one plane and the other curved surface, and a light-transmitting part with two curved surfaces;
A diffuse reflection layer is further arranged between the light guide plate and the reflection plate, diffusion points are paved on one side of the diffuse reflection layer, a first light hole in the reflection plate and a diffusion point gap on the diffuse reflection layer are oppositely arranged, and light rays sequentially pass through the light transmission part, the light guide plate, the diffusion point gap on the diffuse reflection layer and the first light hole;
The diffuse reflection layer is provided with a second light transmission hole corresponding to the first light transmission hole, and light rays sequentially pass through the light transmission part, the light guide plate, the second light transmission hole and the first light transmission hole.
2. The display screen of claim 1, wherein a plurality of the light-transmitting portions are provided on the prism sheet, and the light-transmitting portions are arranged in an array or in a staggered arrangement.
3. The display screen of claim 1, further comprising a collector, wherein the collector comprises a mask, one side of the mask is connected with a reflecting plate, an imaging hole communicated with the first light transmission hole is formed in the mask, a cavity communicated with the imaging hole is formed in the other side of the mask, a photosensitive device is arranged at the bottom of the cavity, and light rays are emitted to the photosensitive device in the cavity through the light transmission part, the first light transmission hole and the imaging hole.
4. A display screen as claimed in claim 3 wherein a lens is provided at the imaging aperture for converging light directed to the photosensitive device.
5. A display screen according to claim 3, wherein the collector comprises a plurality of through holes parallel to each other, a photosensitive device is arranged at the bottom of each through hole, each first light transmitting hole is communicated with at least one through hole, the diameter of each through hole is 0.5-50 microns, and the size of the corresponding collecting area of each through hole is the same as the size of the collected image.
6. The display screen of any one of claims 3-5, wherein a light supplementing light source is provided on a side of the collector connected to the reflective plate.
7. An electronic device comprising a display screen as claimed in any one of claims 1-6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810207068.5A CN110276227B (en) | 2018-03-14 | 2018-03-14 | Display screen |
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| CN201810207068.5A CN110276227B (en) | 2018-03-14 | 2018-03-14 | Display screen |
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| CN110276227A CN110276227A (en) | 2019-09-24 |
| CN110276227B true CN110276227B (en) | 2024-10-15 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110632752A (en) * | 2019-09-27 | 2019-12-31 | Oppo广东移动通信有限公司 | Light gathering plate, light gathering display screen and mobile terminal |
| CN111458932A (en) * | 2020-04-03 | 2020-07-28 | 深圳市德仓科技有限公司 | Backlight module and under-screen fingerprint identification display screen |
| CN113542569B (en) * | 2021-07-16 | 2023-08-22 | Oppo广东移动通信有限公司 | Camera module and electronic equipment |
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| KR101335791B1 (en) * | 2011-11-16 | 2013-12-02 | 엘지전자 주식회사 | Backlight unit and display apparatus thereof |
| CN104182727B (en) * | 2014-05-16 | 2021-07-30 | 深圳印象认知技术有限公司 | Ultra-thin fingerprint and palm print acquisition device and fingerprint and palm print image acquisition method |
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| CN105989325A (en) * | 2015-01-29 | 2016-10-05 | 深圳印象认知技术有限公司 | Fingerprint palm print image collector of honeycomb structure and terminal device |
| CN106228147A (en) * | 2016-08-04 | 2016-12-14 | 京东方科技集团股份有限公司 | A kind of lines harvester, its lines acquisition method and display device |
| CN207833542U (en) * | 2018-03-14 | 2018-09-07 | 印象认知（北京）科技有限公司 | A kind of display screen |
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